If you are a bit immature I would suggest that you act like a man.  Use you acting ability to behave like you wish you were and soon it will become part of you nature.  Acting can be useful in life as I just detailed.  In a work environment acting is very useful.  When was the last time you acted like the bosses idea was good.  How about that last performance review.  Yes, they never are as you see yourself.  Just act like you appreciate the input and move on.  Here https://www.youtube.com/watch?v=THoGRKLkOkY and example of acting in a useful way.